spotify - app only offline mode, webplayer no music

Question

Good Morning, Afternoon, Evening or Night 
 I tried to allow spotify, but it's not working yet. Maybe someone could point me in the right direction? 
 I tried the windows application as well as the web player. I can log in. The webplayer shows me my music but when I press play nothing happens. No error message nothing. In the windows application I get at least a warning that I am offline (code 4). 
 I made a firewall rule which allows traffic on port 4070 according to this spotify-community post and I skipped SSL scanning for the following URLs (recommended in a blog post ): 
 ^https?://[A-Za-z0-9.-]spotify.com/ 
 ^https?://([A-Za-z0-9.-].)?spotify.com/ 
 ^https?://194.68..:* 
 ^https?://193.182..:* 
 ^https?://193.235..:* 
 ^https?://78.31.8.:* 
 ^https?://78.31.12.:* 
 ^https://193.235.232.103/ 
 Anything else I could try?

#ID · Answer

So, the issue was RegEx. After consulting this article , I figured out how to write it correctly (I suppose, I'd be very thankful if someone could confirm that this RegEx works as supposed to and doesn't allow to much!). 
 Port 4070 hasn't to be opened for the web player of Spotify, only for the app. Streaming works with just SSL-check skipping for the following addresses: 
 ^https?://([A-Za-z0-9.-]*\.)?spotify\.com/ ^https?://78\.31\.8\.[0-9][0-9][0-9] ^https?://193\.182\.8\.[0-9][0-9][0-9] ^https?://194\.68\.28\.[0-9][0-9][0-9]

Raphael Florin · Answer

Spotify ips: 78.31.8.0/21 193.182.8.0/21 194.68.28.0/22 from Here . approved here . 
 I use this pattern for SSL-check skipping: ^https?://([A-Za-z0-9.-]*\.)?spotify\.com/ ^https?://([A-Za-z0-9.-]*\.)?scdn\.co/ (because spotify is just the "referer") ^https?://78\.31\.([8-9]{1})\.([0-9]{1,3}) ^https?://78\.31\.1([0-5]{1})\.([0-9]{1,3}) ^https?://193\.182\.([8-9]{1})\.([0-9]{1,3}) ^https?://193\.182\.1([0-5]{1})\.([0-9]{1,3}) ^https?://194\.68\.2([8-9]{1})\.([0-9]{1,3}) ^https?://194\.68\.3([0-1]{1})\.([0-9]{1,3}) 
 Works fine, so far...

CrossRoad IT · Answer

I've been trying to isolate this issue for a while. Finally was able to get it to work. Only exception for HTTPS decryption I needed was: ^([A-Za-z0-9.-]*\.)?scdn\.co/?